by Dave Conklin A new round of lab tests was begun on March 21st at Carollo Enginners UV Test facility in Portland, Oregon. The MS2 phage was used as a surrogate pathogen for the tests. Untreated water from Portland’s well field was adjusted to 81% UV transmissivity using Super Hume and inoculated with the MS2 […]


by Dave Conklin It wasn’t what we wanted to hear. On February 19th we received a report from the independent Oregon lab on their fourth round of water box testing. This report showed worse performance than in the previous round of testing, and, like the previous rounds, was internally inconsistent. There were five tests performed; […]


By Dave Conklin DayZero Products and the Water Box Volunteers group are working together to field test and improve the water box. During the last several months, we have conducted and documented an analysis of water box performance relative to World Health Organization criteria, we have developed a mathematical model of the spatial variability of […]


By Dave Conklin Last month I wrote about our work to adapt the water box to the conditions that we have encountered in our field test in Uganda. In early December our Ugandan colleagues completed the preparations that they could make for deploying two dozen water boxes to test households. Recruitment of participant households and […]

Planned Product Changes

Based on recent test results here in Oregon and at the field trial in Uganda, we have decided to make some changes to our water box products. We are investigating adding a reflector on the inside surface of the tank lid, and we plan to increase the timer duration when external power is used. Details […]


By Dave Conklin on November 4, 2021 A month ago I wrote about the discrepancies between the lab test results from 2019 and the results from this year. We are still working to reconcile the differences between the two labs. In October, we asked Umpqua Research (URC) to repeat a test of hand-cranked operation, but […]

New Lab Test Data

By Dave Conklin on 10/4/21 In 2019 we sent away an early prototype water box to an overseas lab for a microbiological challenge test.  The report from the lab is available on our website. The results were very positive: a “5-log” reduction in the test organism, i.e. a reduction of 99.999%. In August this year […]

How Tough Is It? – The Water Box Can Take A Beating

by David Holman and Dave Conklin, DayZero Products We wondered what kind of damage might occur to the water box if it were to experience likely accidental impacts. We tested two scenarios, one where the case slips from the hand of a user while carrying it by the handle, and a second one, where it […]

Early Adopters

DayZero Products Co. supports our customers.  This letter went out to all those who purchased our pilot-run products, offering to upgrade their water boxes with the learning we gained from the early units.

Storing Water

The Seattle Office of Emergency Management (OEM) recommends storing 1 gallon of water per day for 7-10 days